Multi-blade automatic air register damper

Abstract

An automatically controlled multi-blade damper device for use in air registers installed over furnace duct boots terminating in recesses of floors, ceilings, or walls of dwellings; said boots being part of a central heating and/or air conditioning system. The several damper blades are attached to a gear train and pivotably mounted in a damper housing assembly; said blades being rotatable between open and closed positions by motor driven damper blade attached to gear means and motor means; said motor means, electrically connected to furnace control means and to individual room thermostat, cooperate to maintain the preferred temperature environment in subject room.

I claim: 
     
       1. Damper means automatically controlling the flow of a heating/cooling medium through ducts of a heating/cooling device, said ducts terminating in room floor, wall, or ceiling registers, said damper means comprising combinationally: (a) housing means having end panels and side panels forming an enclosure with angular support means, said end panels receiving bearing pins supporting gear means of transmission means and damper blades of flow control means; said panels receiving grille bars spanning the top of said enclosure;   (b) said flow control means being comprised of air sealing means and multiple damper blades rotatably supported in said enclosure by said bearing pins and a motor shaft, said bearing pins having attachment combinationally to said gear means and said damper blades;   (c) said transmission means comprising motor means and said gear means, said motor means having an integral shaft, with attaching cam, connecting to a driver blade of said damper blades, transmitting motor rotation from said motor means to other said damper blades, all said blades being interconnected by said gear means;   (d) electrical control means energizing and controlling said motor means of said transmission means and a fuel control device of said heating/cooling device, said electrical control means being comprised of thermostatic means electrically connecting relay means and said motor means to said fuel control device through switch means and light means; said relay means comprising first contacts operable by means of a coil, and second contacts operable by a time delay device.   
     
     
       2. The housing means defined in claim 1 wherein each said panel has an extremity angularly positioned to an axis of said panel forming said support means; said grille bars connecting to said panels providing covering means for said flow control means, transmission means, and switch means. 
     
     
       3. The air sealing means set forth in claim 1, being of compressible material, bonding to said panels and said damper blades. 
     
     
       4. The flow control means defined in claim 1, having said damper blades, with air sealing means, connecting to said gear means through said bearing pins, and to said motor means via said motor shaft, said flow control means being rotated by said motor means. 
     
     
       5. The gear means of said transmission means set forth in claim 1 forming a gear train, said gear train having a single gear attaching to each of said damper blades and said driver blade by means of said bearing pins, said motor connecting to said driver blade and rotating said gear train and said flow control means. 
     
     
       6. The electrical control means of claim 1 having said thermostatic means comprising a switch connecting said motor means to said relay means and said fuel control device through said light means, said motor means rotating said flow control means to an open position when said switch is in a first position; a second position of said switch deenergizing said fuel control device, and said relay means, and cooperating with said motor means to retain said flow control means in an open position until said time delay relay operates to close a set of contacts. 
     
     
       7. Damper means automatically adjusting the temperature in individual rooms or spaces in response to thermostatic demand, said damper means including: (a) housing means having an open bottom section, and a top section enclosed by a grille network, said grille network attaching to panels, said panels forming a perimeter and providing support for said housing means, said housing means enclosing flow control means, transmission means, and a portion of electrical control means;   (b) said flow control means comprising a multiplicity of damper blades and compressible air sealing means, said damper blades, conjunctionally with gear means, attaching to bearing pins and rotatably mounted in said housing means;   (c) said transmission means providing rotation to open and close said flow control means mounted in said housing means, said transmission means being comprised of motor means having a shaft attaching to one blade of said damper blades; said gear means attaching to said damper blades through said bearing pins;   (d) said electric control means having a thermostatic switch providing an electrical interlock between said motor means, a fuel control device, and relay means; said interlock including light means communicating the status of a heating/cooling device controlled by said thermostatic means, and switch means comprising a two-way switch, and a one-way switch.   
     
     
       8. The motor means defined in claim 7 having a cam attaching to said motor shaft, said cam operating said switch means. 
     
     
       9. The relay means set forth in claim 7 comprising a relay coil, a set of coil contacts, and a time delay device having contacts; said coil contacts being operable when said thermostatic means energizes said relay coil and said fuel control device.